FIX: plot_gradients() requires transposing gradients

[oesteban]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 66.24%. Comparing base (795a9b7) to head (0c4cebf).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/eddymotion/data/dmri.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #254   +/-   ##
=======================================
  Coverage   66.24%   66.24%           
=======================================
  Files          19       19           
  Lines         942      942           
  Branches      119      119           
=======================================
  Hits          624      624           
  Misses        274      274           
  Partials       44       44           

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